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#!/bin/bash
# ------------------------------------------------------------------------------
# map-partitions
#
# Maps partitions in a block device to logical devices using dmsetup and sfdisk
#
# Usage: map-partitions[.bash] [options] target [name]
#
# Copyright (c) 2019 konsolebox
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
# ------------------------------------------------------------------------------
VERSION=2019-05-25
shopt -s extglob || exit 1
function show_warnings {
echo "WARNING: This tool does not guarantee functionality.
WARNING: It has only been tested with MSDOS partitions.
WARNING: Read its code for details on the license regarding its usage." >&2
}
function show_usage_and_exit {
echo "Maps partitions in a block device to logical devices using dmsetup and sfdisk
Usage: $0 [options] target [name]
Options:
-h, --help Show this help info.
-H, --hide-warnings Hide warnings.
-V, --version Show version.
" >&2
show_warnings
exit 1
}
function call {
local msg=() i=0 __
for __; do
[[ $__ != +([[:alnum:]_\-=+,.:@]) ]] && __=\"${__//\"/\\\"}\"
msg[i++]=$__
done
printf '%s\n' "${msg[@]}"
"$@"
}
function main {
local target name dev start_key start size_key size id_key id i __
local args=() hide_warnings=false
while [[ $# -gt 0 ]]; do
case $1 in
-h|--help)
show_usage_and_exit
;;
-H|--hide-warning|--hide-warnings)
hide_warnings=true
;;
-V|--version)
echo "${VERSION}"
exit 1
;;
*)
args+=("$1")
;;
--)
args+=("${@:2}")
break
;;
-*)
echo "Invalid option: $1" >&2
exit 1
;;
esac
shift
done
set -- "${args[@]}"
[[ $# -eq 1 || $# -eq 2 ]] || show_usage_and_exit
[[ ${hide_warnings} == true ]] || show_warnings
target=$1 name=${2-${1##*/}} i=1
while IFS=' :,=' read -ru 4 dev start_key start size_key size id_key id; do
if [[ ${start_key} == start && size -gt 0 ]]; then
call dmsetup create "${name}p${i}" --table "0 ${size} linear ${target} ${start}" || \
return 1
(( ++i ))
fi
done 4< <(exec sfdisk -df "${target}")
}
main "$@"
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